Certain photographic applications need an extremely differentiated scale focusing - e.g. when using a laser distance meter. ALPA offers with the ALPA HPF rings a unique and retrofittable solution for these requirements which is - in contrast to other offerings - truly usable in freehand operation which can be used also in the field without complicated translation work. The rings are available in easy to read and comprehensible meter and feet scales. 

Every scale features engraved distance readings from infinity, the first five degrees and then consecutively every five degree up to 270 degrees. The single degrees in between are clearly marked. If you need the full resolution you can download the detailed distance tables for the lenses. The table also offers the corresponding metering when using the ALPA macro adapters.

For an even better handling we added the removable focusing knobs to every HPF ring.

Available HPF rings for Schneider lenses

• Schneider Apo-Digitar 5.6/35 mm XL = AAS 36
• Schneider Super-Angulon 5.6/38 mm XL = SSA 38
• Schneider Apo-Digitar 5.6/43 mm XL = AAH 43 / SAD 43
• Schneider Apo-Digitar 5.6/47 mm XL = AAH 48 / SAD 47
• Schneider Super-Angulon 5.6/47 mm XL = SSA 47
• Schneider Super-Angulon 5.6/58 mm XL = SSA 58
• Schneider Apo-Digitar 5.6/60 mm XL = AAH 60
• Schneider Apo-Digitar 4.0/60 mm N = SAD 60
• Schneider Apo-Digitar 5.6/72 mm L = SAD 72
• Schneider Apo-Digitar 4.0/80 mm N = SAD 80
• Schneider Super-Symmar 4.5/80 mm XL = SSS 80
• Schneider Apo-Digitar 4.5/90 mm N = SAD 90
• Schneider Apo-Digitar 5.6/100 mm N = SAD 100

Detailed distance tables (meter/feet)

Instruction video - How to mount the HPF rings